I wanted to share how much I like the GM light reels from the 90's Chevy and GMC full size trucks. You can pick them up cheap from junk yards where you remove it yourself. They come off the passenger side inner fender and come off with 3 bolts. The light bulb is almost always good because people rarely use them or know their full potential. They have an on/off switch, and they unclip and can extend a good 15 feet or so. In my pictures I have soldered large alligator clips on mine, but I suppose you can install a male end to plug in to your aux power outlet if you have one. They come with a magnet on the bulb housing that usually comes off over time (I'm gluing mine back on in the pic) which is kind of nice to stick to some of our bike metals. I think this will go under my seat.